| J Kidd Services Limited | Agriculture & fishing | 2022 |
| J Lord Properties Limited | Real estate | 2015 |
| J M C Window Machinery Limited | Manufacturing | 1999 |
| J P Gregory Property Group Ltd | Real estate | 2025 |
| J Stones Design Ltd | Professional & scientific | 2024 |
| J T Financial Services Limited | Financial services | 2020 |
| J W Rigby Limited | Wholesale & retail | 2007 |
| J Warren Consulting Ltd | Professional & scientific | 2017 |
| J Warren Property Limited | Real estate | 2023 |
| J&D Worx Ltd | Construction | 2026 |
| J&J UK Holding Ltd | Wholesale & retail | 2024 |
| J&L Partners Ltd | Manufacturing | 2025 |
| J. Mitchell Wall & Floor Tiling Limited | Construction | 2008 |
| J.A.C Plumbing and Heating Limited | Construction | 2026 |
| J.C.I. Limited | Wholesale & retail | 1999 |
| J.J.Cookson Limited | Professional & scientific | 1948 |
| J.J.J. Heathcote Limited | Wholesale & retail | 1956 |
| J.Moss Engineering Ltd | Manufacturing | 2025 |
| J.R. Glazing & Maintenance Ltd | Construction | 2010 |
| J.R. Seed Limited | Real estate | 2006 |
| J3T Limited | Manufacturing | 2014 |
| JA Brickwork and Construction Ltd | Construction | 2023 |
| JA Garden Maintenance Limited | Administrative & support | 2021 |
| Jackdaw Sustainability Ltd | Professional & scientific | 2020 |
| Jackson Building (Macclesfield) Ltd | Construction | 2025 |
| Jackson Consultancy Europe Limited | Professional & scientific | 2003 |
| Jackson LUX Properties Ltd | Real estate | 2026 |
| Jacob G Plastering Limited | Construction | 2022 |
| Jadm Property Limited | Households | 2021 |
| JAH Commerce Limited | Wholesale & retail | 2021 |
| Jake Adam Luke Ltd | Administrative & support | 2023 |
| Jake Investments Limited | Professional & scientific | 2004 |
| Jakelara Limited | Health & social care | 2006 |
| JAL Rooms Ltd | Real estate | 2024 |
| James Gilberthorpe Limited | Professional & scientific | 2024 |
| James Harrop Driving School Limited | Education | 2019 |
| James Leach Joinery Ltd | Construction | 2024 |
| James Medical Writing Ltd | Professional & scientific | 2020 |
| James RAW Properties Limited | Real estate | 2021 |
| James Rooney Associates LLP | | 2002 |
| James Thomas Wilson Limited | Administrative & support | 2022 |
| Jamie Glover Ltd | Information & communication | 2022 |
| Jamie Rowbotham Limited | Professional & scientific | 2024 |
| Jamric Limited | Administrative & support | 2013 |
| JAN Tech Projects Limited | Construction | 2013 |
| Jane Bostock Travel Limited | Administrative & support | 2015 |
| Janhill Estates Limited | Real estate | 2002 |
| Janhill Limited | Real estate | 1979 |
| Janky Robot Ltd | Information & communication | 2025 |
| Janna Authentic Lebanese Ltd | Hospitality | 2025 |
| Japautoagent Limited | Wholesale & retail | 2004 |
| Jarco Macclesfield Ltd | Households | 2026 |
| Jardin Holdings Ltd | Financial services | 2025 |
| Jarvell Limited | Wholesale & retail | 2018 |
| Jarvis Estates Ltd | Real estate | 2024 |
| Jase Bloor Ltd | Professional & scientific | 2026 |
| Jasmine Park Pavilion CIC | Administrative & support | 2015 |
| Jasponisca Ltd | Information & communication | 2021 |
| Jaxweld Limited | Manufacturing | 2013 |
| Jay's Climbing Frame Installers Ltd | Construction | 2025 |
| Jayne Bean Design & Build Limited | Construction | 2002 |
| Jayz African Store Limited | Wholesale & retail | 2023 |
| JB 30 Limited | Construction | 2021 |
| JB Aggregates & Timber Limited | Administrative & support | 2025 |
| JB Golf Limited | Arts & recreation | 2012 |
| JB Programming Ltd | Administrative & support | 2022 |
| JBH Diagnostics & Repair Limited | Extraterritorial | 2015 |
| JBH Enterprise Ltd | Other services | 2024 |
| JBH Machinery Ltd | Wholesale & retail | 2025 |
| JBH Repair Ltd | Construction | 2024 |
| Jbsi Group Limited | Professional & scientific | 2020 |
| Jbsi Limited | Wholesale & retail | 2013 |
| JBV Limited | Wholesale & retail | 2003 |
| JCL Automotive Ltd | Extraterritorial | 2023 |
| Jcubs Trading Ltd | Wholesale & retail | 2020 |
| JD Counselling Ltd | Other services | 2023 |
| JD Forward Consulting Ltd | Real estate | 2024 |
| Jdlh Ltd | Administrative & support | 2021 |
| Jemoco Limited | Administrative & support | 2022 |
| Jennifer Leigh Productions Ltd | Arts & recreation | 2022 |
| Jenny Odum Toxicology Limited | Professional & scientific | 2008 |
| Jennys Blinds Limited | Wholesale & retail | 1996 |
| Jenotype Communications Ltd | Professional & scientific | 2024 |
| JEP Investments Ltd | Financial services | 2024 |
| Jepson Electrical & Engineering Ltd | Manufacturing | 2019 |
| Jeremy COX Limited | Information & communication | 2016 |
| JET ROD (Bosley) LLP | | 2004 |
| Jfjg Limited | Manufacturing | 2005 |
| Jgshaw Property Investments Limited | Real estate | 2024 |
| JH Tech Consulting Limited | Administrative & support | 2022 |
| JHA Professional Limited | Professional & scientific | 2015 |
| Jigsaw Enterprises PUB Co Ltd | Hospitality | 2025 |
| Jigsaw Residential Surveyors Ltd | Professional & scientific | 2024 |
| Jigsaw Surveyors Limited | Professional & scientific | 2005 |
| Jill Thomas Ltd. | Extraterritorial | 2024 |
| Jim's Jerseys Ltd | Administrative & support | 2022 |
| Jin's Oriental Ltd | Hospitality | 2017 |
| JJ Market Ltd | Wholesale & retail | 2019 |
| JJ Medical Communications Limited | Professional & scientific | 2019 |
| Jjdx Services Ltd | Construction | 2024 |